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Finding the Fourth Proportional to 7,910.98, 11,865.12 and 2,645.62

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Solution

The fourth proportional to 7,910.98, 11,865.12 and 2,645.62 is: 3,967.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,910.98 : 11,865.12 = 2,645.62 : x
  2. Step 2: Convert to fraction form
    7,910.98/11,865.12 = 2,645.62/x
  3. Step 3: Cross multiply
    7,910.98x = 11,865.12 × 2,645.62
  4. Step 4: Simplify right side
    7,910.98x = 31,390,598.77
  5. Step 5: Solve for x
    x = 31,390,598.77/7,910.98
  6. Step 6: Final answer
    x = 3,967.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.